Techniques for measuring aerosol attenuation using the Central Laser Facility at the Pierre Auger Observatory - Abreu, P.; Albuquerque, Ivone Freire da Mota e; Souza, Vitor de; Gouffon, Philippe; Peixoto, C. J. Todero; Tridapalli, Diogo Bernardes (Journal of Instrumentation, 2013)